2-cyclohexyl-4-(2-hydroxyethyl)-3-methylmorpholine esters of substituted benzoic acids



United States 2 CYCLOHEXYL 4 (2 HYDROXYETHYL) 3-' This invention relates to 3 alkyl-2-cycloalkyl-4-hydroxyalkylmorpholine esters of benzoic acid and its derivatives. More particularly, this invention relates to chemical compounds of the formula wherein Cy represents a cycloalkyl radical; R represents an alkyl radical; Alk represents an alkylene radical; and Ph represents a phenyl radical optionally substituted by halogen and/or one or more alkyl, alkoxy, nitro, amino, and/ or dialkylamino radicals.

Among the cycloalkyl radicals represented by Cy, cyclohexyl radicals are of choice. The alkyl radicals repre sented by R are desirably lower alkyl radicals, illustratively, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secbutyl, tert-butyl, pen-tyl, isopentyl, neopentyl, hexyl, isohexyl, heptyl, octyl, land isomeric groupings, among which methyl radicals are preferred. The alkylene radicals represented by Alk are bivalent saturated acyclic straightor branched-chain hydrocarbon groupings such as methylene, trimethylene, propylene, tetramethylene, and 2,2-dimethyl-1,3-propylene, but optimally ethylene. Finally, as to Ph, it is especially advantageous that one or more identical nuclear substituents of the class described be presentin the case of alkyl, alkoxy, and dialkyl amino substituen-ts, those of lower order.

It follows that Ph is most suitably a halophenyl, polyhalophenyl, (loweralkyDphenyl, poly-(lower alkyl)phenyl, (lower alkoxy)phenyl, poly(lower alkoxy)phenyl, nitrophenyl, aminophenyl, or di(lower ialkyl)aminophenyl radicall he nuclear substituents may be present in any available position or combination of positions on the benzene ring; and inasmuch as the substituted phenyl radicals referred to, like all the other chemical entities set forth herein, are unexceptionably named in accordance with recommendations of the International Union of Pure and Applied Chemistry and Chemical Abstracts (of. specifically Section 75 of the Introduction, With Key and Discussionof the Naming of Chemical Compounds for Indexing, CA. 39, 5867 ff, with respect to compound radical names), those skilled in the art will readily recognize that halophenyl radicals are exclusively radicals of the formula halogen) 1:

(lower alkyl)phenyl radicals are exclusively radicals of the formula lower alkyl 3,047,574 Patented July 31, 1962 po1y(lower alkyl)phenyl radicals are exclusively radicals of the formula lower alkyDn (lower alkoxy)phenyl radicals are exclusively radicals of the formula Ol0wer alkyl poly(lower alkoxy)phenyl radicals are exclusively radicals of the formula nitrophenyl radicals are exclusively radicals of the lower elkyl) n formula :aminophenyl radicals are exclusively radicals of the formula and di(lower alkyl)aminophenyl radicals are exclusively radicals of the formula e N (lower alkyDz n in each instance being a positive integer greater than 1 and less than 6.

Equivalent to the basic esters hereinbefore disclosed for the purposes of this invention are their acid-addition salts, of the formula "The compounds to which this invention relates are useful because of their valuable pharmacological properties. Specifically, they are anti-fungal agents effective against such microorganisms as T richophyton mentagrophytes; and moreover they favorably affect the central nervous system, for example, by suppressing appetite.

Manufacture of the basic esters hereof proceeds by heating a selected morpholine O Cy with an appropriate acid chloride PlrCOOCl and basifying the product, Cy, R, Alk, and Ph in the foregoing formulas being defined as above. lternatively, the acid chloride is replaced by the corresponding methyl ester Ph-COOCH in the presence of sodium methoxide, metallic sodium, and an inert high-boiling anhydrous solvent such as xylene, P11 in the formula for the methyl ester being defined as before.

Conversion of the basic esters of this invention to their acid addition salts is accomplished by simple admixture of these compounds with one or more equivalents, respectively, of any of various inorganic and strong organic acids, the anionic portion of which conforms to Q as hereinbefore defined.

The following examples describe in detail compounds illustrative of the present invention and methods which have been devised for their manufacture. However, the invention is not to be construed as limited thereby, either in spirit or in scope, since it will be apparent to those skilled in the art of organic synthesis that many modifications, both of materials and of methods, may be practiced without departing from the purpose and intent of this disclosure. Throughout the examples hereinafter set forth, temperatures are given in degrees centigrade and relative amounts of materials in parts by weight, except as otherwise noted.

Example 1 white solid melting at approximately l61-162. It has the formula CH3 i omom-mpQ .1101

B. 2-(Z-cyclohexyl-3-methylmorpholino)ethyl Z-chlor0benz0ate.An aqueous suspension of the acid addition salt of the preceding part A of this example is made alkaline with aqueous caustic, temperatures being maintained below 20 in process. The resultant mixture is extracted with ether. The ether extract, dried over anhydrous sodium sulfate and stripped of solvent by distillation, affords 2-(2-cyclohexyl-3-methylmorpholino)-ethyl 2-chlorobenzoate as the residue.

Example 2 2-(2-cycl0hexyl 3 methylmorpholino)ethyl 3-chlorobenzoate hydrochl0ria'e.Substituting approximately 16 parts of methyl 3-chlorobenzoate for the methyl 2-chlorobenzoate called for in Example LA, and employing 3400 parts of xylene rather than the 5400 parts there specified, one obtains, by a procedure otherwise identical, 2-(2-cyclohexyl-3-methylmorpho1ino)ethyl 3-chlorobenzoate hy- 4 drochloride, M.P. approximately 186-187. The product has the formula Ion, t

OHzCHz-O-WQ .nor

Example 3 2-(2-cyclohexyl-3-methylm'orpholino)ethyl 4 bromobenzoare hydrochloride-To an anhydrous solution of 20 parts of 2-cyclohexyl-4-(Z-hydroxyethyl)-3-methylmorpholine and 19 parts of methyl 4-bromobenzoate in approximately 5400 parts of xylene is added 2 parts of sodium methoxide and a catalytic amount of metallic sodium. The resultant mixture is distilled to /6 its original volume, then cooled to room temperature and filtered. The filtrate is made just acid with a 25% solution of hydrogen chloride in 2-propanol, then diluted with anhydrous ether to the point of incipient turbidity and chilled. A precipitate of 2-(2-cyclohexyl-3-methylmorpholino)ethyl 4-bromobenzoate hydrochloride is thrown down. Recovered on a filter and recrystallized from a mixture of absolute ethanol and anhydrous ether, the colorless product melts at 223-225 It has the formula oHQOHPO- Q .HO]

Example 5 2-(2-cycl0hexyl 3 methylmorpholin0)ethyl Z-bromobenzoate hydrochloride.-Substitution of approximately 18 parts of methyl 2-bro1nobenzoate for the methyl 4- bromobenzoate called for in Example 3 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl 2-bromobenzoate hydrochloride as a white powder, M.P. 155458". The product has the formula CH N Example 6 2 (2-cyclohexyl-3-methylm0rph0lino)ethyl 4-iod0benzoate hydrochloride.-Substitution of approximately 23 parts of methyl 4-iodobenzoate for the methyl 4-bromobenzoate called for in Example 3 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino) ethyl 4-iodobenzoate hydrochloride as iridescent solid melting at 224-226". The product has the formula on N 3 dmom-o-p-Q-r .1101

Example 7 2-(2 cycl0hexyl-3-methylmorpholino)ethyl Z-iodobenzoate hydrochloride-Substitution of approximately 23 parts of 2-cyclohexyl-4-(2-hydroxyethyl)-3-methylmorpholine and approximately 26 parts of methyl 2-iodobenzoate for the 20 parts of 2-cyclohexyl-4-(Z-hydroxyethyl)-3-methylmorpholine and 19 parts of methyl 4- bromobenzoate, respectively, called for in Example 3 atfords, by the procedure there detailed, 2-(2-cyclohexyl-3- methylmorpholino)ethyl 2-iodobenzoate hydrochloride as a white powder melting at 144-147". The product has the formula dmom-o-g-Q .HCl

Example 8 2-(2 cyclohexyl-3-methylmorpholin0)ethyl 2,4-a'ichl0- robenzoate hydr0chl0ride.Substitution of approximately 9 parts of 2,4-dichlorobenzoyl chloride for the 3-bromobenzoyl chloride called for in Example 4 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino) ethyl 2,4-dichlorobenzoate hydrochloride as white needles melting at approximately 201.0-201.3. The product has the formula Example 9 2 (2 cyclohexyl 3 methylmorpli0lin0)ethyl 3,4-diiodobenzqate hydrochl0ride.--Substitution of 20 parts of 3,4-diiodobenzoyl chloride for the 3-bromobenzoyl chloride called for in Example 4 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl 3,4- diiodobenzoate hydrochloride, of the formula Example 10 2- (2-cyclohexyl-3-methylmorpholino) ethyl 2,4,5-trichl0- robenzoate hydr0chl0ride.--Substitution of approximately 10 parts of 2,4,5-trichlorobenzoyl chloride for the 3- bromobenzoyl chloride called for in Example 4 affords,

by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl 2,4,5-trichlorobenzoate hydrochloride, of the formula cimom-o-gQor .HCl

Example 11 2-(Z-cyclohexyl-3-methylmorpholino) ethyl pentachlorobenzoate hydrochloridez-Substitution of approximately 15 parts of pentachlorobenzoyl chloride for the 3-bromobenzoyl chloride called for in Example 4 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl pentachlorobenzoate hydrochloride, of the formula Example 12 3 Ion l GHZOHZ-O-hJ-Q-OOH .1101

Example 13 2-(2-cyclohexyl-3-methylm0rph0lino)ethyl Z-methoxybenzoate hydrochbride-Substitution of approximately 7 parts of 2-methoxybenzoyl chloride for the 3-bromobenzoyl chloride called for in Example 4 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl Z-methoxybenzoate hydrochloride as White crystals, M.P. 171.5-174.5. The product has the formula dmGm-O- -Q .1101

(SCH,

Example 14 2-(2-oycldhexyl 3 methylmorpholino) ethyl 3,4,5 -trimethoxybenzoate hydr0chl0ride.-To an anhydrous solution of 20 parts of 2-cyclohexyl-4-(2-hydroxyethyl)-3- methylmorpholine and approximately 20 parts of methyl 3,4,5-trirnethoxybenzoate in approximately 4500 parts of xylene is added 2 parts of sodium methoxide and a catalytic amount of metallic sodium, The resultant mixacc /em the formula C H O C E III 3 I 3 OHgOH2-0fi OOHI! .HCl

Example 2-(2-cyclohexyl-3-meflzylmorpholino)ethyl 4-nitr0benzoaze hydrochl0ride.--Substitution of approximately 16 parts of methyl 4-nitrobenzoate for the methyl 4-bromobenzoate called for in Example 3 affords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpho- 1ino)ethyl 4-nitrobenzoate hydrochloride as a colorless solid, the melting point of which is 205208. The product has the formula Example 16 2-(2-cycZ0hexyl-3-methylmorpholino)ethyl 3-nitrobenzoate hydrochloride.Substitution of approximately 16 parts of methyl 3-nitrobenzoate for the methyl 4-bromobenzoate called for in Example 3 aifords, by the procedure there detailed, 2-(2-cyclohexyl-3-methylmorpholino)ethyl B-nitrobenzoate hydrochloride as colorless crystals, M.P. approximately 193-194". The product has the formula dnionz-o cz- .1301

Example 17 2-(Z-cyclohexyl-3-methylm0rph0lin0)ethyl 3-dimethylaminobenzoate dflhydr0br0mide=-To an anhydrous solution of parts of 2-cyclohexyl-4-(Z-hydroxyethyl)-3- methylmorpholine and approximately 16 parts of methyl 3-dimethylaminobenzoate in approximately 5000 parts of xylene is added 2 parts of sodium methoxide and a catalytic amount of metallic sodium. The resultant mixture is distilled to /6 its original volume, then cooled to room temperature and filtered. The filtrate is made just acid with a solution of hydrogen bromide in 2- propanol, then diluted with anhydrous ether to the point of incipient turbidity and chilled. A heavy oil is thrown down. The supernatant solvent is decanted, and the oil is taken up in absolute ethanol and precipitated with anhydrous ether to give 2-(2-cyclohexyl-3-methylmorpholino)ethyl B-dimethylaminohenzoate dihydrobrornide as a white crystalline solid melting at 205-207 with decomposition. The product has the formula a)2 Example 18 2 (2 cyclohexyI-E-methylmorpholino)ethyl 4-diethylaminobenzoate dihydrochloride.-Substitution of approximately 18 parts of methyl 4-diethylaminobenzoate for the 4-bromobenzoate called for in Example 3 affords, by the procedure there detailed, 2-(2-cycloheXyl-3-methylmorpholino)ethyl 4-diethylaminobenzoate dihydrochloride, of the formula N hmom-o-g-G-mmnm .2HC1

What is claimed is: 1. A compound of the formula -cyclohexyl wherein Z represents a member of the group consisting of radicals of the formulas @htuogen) n @O-alkyl) n 1 @NM @N (alk l in which n represents a positive integer less than 6 and the alkyl radicals called for contain fewer than 9 carbon atoms.

2. A compound of the formula halogen) 11 wherein n represents a positive integer less than 6.

3. A compound of the formula 9 10 wherein n represents a positive integer less than 6. 9. 2-(2-cycl0heXyl-3-methyln1orpholinoethyl) 4-nitr0- 4. 2-(2-eye1ohexyl-3-methylmorpholfino) ethyl 2-chlorobenzoate. benzoate. 10. A compound of the formula 5. 2-( Z-cyclohexyl-3-methy1morpholino) ethyl 2,4 dichlorobenzoate. 5 O

6. A compound of The formula f cyclohexyl cyclohexyl -CH3 N(a1ky1)1 N NJ- a O CH: 10 (|JH2CH2O$|1 LH CH O-(fi O 7 2 (z cyclohexyl 3methylmorphofino)ethyl wherein the alkyl rad1ca1s called for contam fewer than t 1 15 9 carbon atoms. oxybenzoa're. 8 A compound of the formula 11. 2-(2-eyclohexyl-3-methylrnorph0l1no) ethyl 3 d1- O methylarninobenzoate.

cyclohexyl References Cited in the file of this patent r N02 UNITED STATES PATENTS I 2782112 Gilbert et -al Feb. 19 1957 CH CH OC 2 9) 2,868,786 Siemer et al. 1 Jan. 13, 1959 2,956,081 Kusserow et a1 Oct. 11, 1960 

1. A COMPOUND OF THE FORMULA 